Results 1 to 10 of about 1,010 (120)
IEEE Access, 2021 When an electromagnetic transient occurs in a transformer, certain parts of the winding will be over stressed internally, which in severe cases will lead to the destruction of the winding insulation.
Chenchen Zhang +3 more
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BLOCKING ALGORITHM FOR CURRENT PROTECTION DURING INRUSH MAGNETIZATION CURRENT
Наука и техника, 2014 The paper presents blocking algorithm for current protection during inrush process. The algorithm is based on the evaluation of the ratio of the positive sequence second harmonic current to the negative sequence first harmonic current.
F. A. Romaniuk, M. S. Loman
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Pre-energize Analysis on 3 Phase Transformer by Considering Each Phase Flux
JAREE (Journal on Advanced Research in Electrical Engineering), 2019 Inrush current is a transient phenomenon that occurs when a transformer is first energized to a voltage source at no-load conditions. It causes a very high inrush current.
Hadwim Septiawan
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Energies, 2019 In recent years, the zero-mode inrush current of high-impedance transformer with built-in high-voltage winding (T-Hin), which has large amplitude and decays slowly, causes the misoperation of zero-sequence overcurrent protection.
Wenbin Cao +5 more
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Energies, 2021 When the electromagnetic transients occur in a power transformer, an inrush current is generated in its winding. The inrush current not only affects the performance of the transformer windings, but also affects the lifetime of the transformer.
Wenqi Ge +4 more
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Energies, 2018 This paper proposes the inrush current suppressor using an AC chopper in a large-capacity wind power generation system (WPGS) with two squirrel-cage induction machines (SCIMs), which are switched over depending on the wind speed. The input side of the AC
Sho Shibata +3 more
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Effect of CT transient characteristics on transfer of inrush
The Journal of Engineering, 2019 During the inrush period, multiple misoperation accidents of differential protection of transformers happened, which seriously threatened the safe and stable operation of power grid.
Wei Liu +5 more
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Automatic J–A Model Parameter Tuning Algorithm for High Accuracy Inrush Current Simulation
Energies, 2017 Inrush current simulation plays an important role in many tasks of the power system, such as power transformer protection. However, the accuracy of the inrush current simulation can hardly be ensured.
Xishan Wen, Jingzhuo Zhang, Hailiang Lu
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The Journal of Engineering, 2019 The power transformer is the major electrical equipment in the power system and should be able to resist the damage that caused by the abnormal conditions, like the influence of the inrush current and the electromagnetic force. However, the residual flux,
Wenqi Ge, Jianhai Zhao, Youhua Wang
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Systematization of the Simulation Process of Transformer Inrush Current Using EMTP
Applied Sciences, 2019 An inrush current is generated when a transformer is energized. This current has a large magnitude and rich harmonics, thereby causing mal-operation of the protection relay.
Hun-Chul Seo, Gi-Hyeon Gwon
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